[mlpack-git] [mlpack/mlpack] GammaDistribution: Adds functionality to solve #749 (#751)

[Ryan Curtin]

> @@ -78,6 +86,19 @@ class GammaDistribution
>       */
>      void Train(const arma::mat& rdata, const double tol = 1e-8);
>      
> +    /** Fits an alpha and beta parameter according to observation probabilities.
> +     * 
> +     * @param observations The reference data, one observation per column
> +     * @param probabilities The probability of each observation. One value per
> +     *     column of the observations matrix.
> +     * @param tol Convergence tolerance. This is *not* an absolute measure:
> +     *    It will stop the approximation once the *change* in the value is 
> +     *    smaller than tol.
> +     */
> +    void Train(const arma::mat& observations, 
> +                                  const arma::vec& probabilities,
> +                                  const double tol = 1e-8);

Indentation seems odd here.

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